. >> brown: then, from tel aviv, margaret warner reports on the israeli elections, as prime minister benjamin netanyahu's party was on track to stay in power by a narrow margin. netanyahu tries to put together, it's sure to include new faces and new agendas that will influence the country. >> ifill: we examine a new study on concussions, showing the impact of hard hits on the brains of living but retired n.f.l. players. >> i go through stages where i think how come i can't remember that and i always wondered are these age-related or are they conclusion related? >> brown: and we mark the 40th anniversary of the "roe v. wade" decision by the supreme court, with a look at the strategies of abortion rights advocates and opponents. that's all ahead on tonight's newshour. >> major funding for the pbs newshour has been provided by: close to iconic landmarks, to local life, to cultural treasures. it's a feeling that only a river can give you. these are journeys that change your perspective on the world. and perhaps even yourself. viking river cruises. exploring the world in comfort. >> bnsf railway.